How hot does your S8 run?

[SharkGill]

Been meaning to ask for a few weeks. With recent temperatures regularly in the 30s I’ve noticed my coolant temperature hitting upto around 110 during ‘spirited’ drives. Poodling around in traffic the temps go back down to the normal 90 ish so I think water pump is functioning correctly. I did try testing the viscous fan clutch with the old newspaper method and I was able to stop it. Also haven’t heard the normal loud woosh from the fan at any point when they usually are engaged. Thoughts anyone?

[The_Laird]

I’ve had similar problems a couple of times in my ownership and it’s been either thermostat/pump (when a garage fitted non-Audi parts) or the fan. Apart from that, My S8 sits at 90 even in the recent heatwaves.

[MikkiJayne]

Mine runs at 90, always. Even 30 degrees ambient in attack mode round the Nurburgring

If its at 110 both fans should be on max speed and sounding like jet engines. Sounds like the viscous clutch is not clutching, and possibly the electric fan is also having issues. The electric fan should come on at speed 1 with the AC. It then uses the thermoswitch in the rad for speed 2, and the cluster has an 'oh shit' trigger for speed 3 which should definitely be on at 110 - pretty sure the set point for that is 105.

I have an electric fan conversion instead of the visco and mine will sit there with both fans on #1, even in this weather.